On Mon, 2008-05-19 at 16:37 +0400, Serge D. Mechveliani wrote:

People,

I need to install ghc-6.8.2 from source. As I recall, this needs Happy and Alex. Right?

No, not if you are using a released ghc tarball because they include the output of happy and alex. You only need happy and alex if you want to build the development version of ghc from darcs.

Among Happy versions, it is visible only a couple latest ones, and to install any of them, one needs Cabal. Installing Cabal is as follows: make install mkdir -p dist/tmp ghc --make -cpp -Wall -DCABAL_VERSION=1,2,3,0 -i. -odir dist/tmp -hidir dist/tmp Setup.lhs -o setup make: ghc: command not found.

We have a `make' loop: ghc --> Happy --> Cabal --> ghc

Remember that you always need an existing ghc binary to be able to build ghc from source.

Old Happy was good: it did not require GHC -- as I recall. Do I mistake?

Happy is written in Haskell and typically people build it from source using GHC.

Now I have to install GHC from binary, and it will report of library version mismatch ... and so on. Do not you think that, generally, something is going wrong here?

You'll need at least a ghc binary to bootstrap with. See the ghc building guide: http://hackage.haskell.org/trac/ghc/wiki/Building Duncan